check if host is part of group

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1

Hi

I have this setup in my hosts

server1 ansible_ssh_host=server1.xxx.com
server2 ansible_ssh_host=server2.yyy.com

server3 ansible_ssh_host=server3.yyy.com

[frontendservers]
server1
server2
server3

[frontendcluster1]

server1
server2

My playbook:

2

Hi Khuong,

Just create a group for these hosts, and change your hosts: line in the
playbook :

[onlythose]
server1
server2

- hosts: onlythose
  tasks:
    - name: testing
      command: copy some file

Cheers,

M

3

Super easy!

  • hosts: frontendcluster1
    tasks:
    …

You can have multiple plays in a playbook file.

For more complex things you can also say stuff like:

  • hosts: group1:&group2

Which means “must be in both”

See http://ansibleworks.com/docs/intro_patterns.html

4

almost always better to do as mentioned above but if you REAAAAAAALLLLYYYY need it:

when: inventory_hostname in groups[‘frontendcluster1’]

5

Hi

Thx. Just what I need.

It’s because I have one playbook for my frontendservers hosts. This playbook include roles but only some of the tasks should be deploy on a subset of the frontendservers. i.e. part of frontendcluster01 group

6

when: inventory_hostname in groups[‘frontendcluster1’]

Also more easily written as:

when: inventory_hostname in groups.frontendcluster1

7

Awesome tip! Much better than the quotation hell that I've been using :slight_smile:

when "'frontendcluster1' in group_names"

K

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